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| Section | Weight | Objectives |
|---|---|---|
| Information Systems Acquisition, Development and Implementation | 12% | - Implementation
|
| Governance and Management of IT | 18% | - IT Management
|
| Protection of Information Assets | 26% | - Access and Data Protection
|
| Information Systems Auditing Process | 18% | - Planning
|
| Information Systems Operations and Business Resilience | 26% | - Business Resilience
|
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NEW QUESTION # 842
Which of the following transmission media is LEAST vulnerable to cross talk?
Answer: B
Explanation:
Explanation/Reference:
Fiber optics cables are used for long distance, hard to splice, not vulnerable to cross talk and difficult to tap. It supports voice data, image and video.
For your exam you should know below information about transmission media:
Copper Cable
Copper cable is very simple to install and easy to tap. It is used mostly for short distance and supports voice and data.
Copper has been used in electric wiring since the invention of the electromagnet and the telegraph in the
1820s.The invention of the telephone in 1876 created further demand for copper wire as an electrical conductor.
Copper is the electrical conductor in many categories of electrical wiring. Copper wire is used in power generation, power transmission, power distribution, telecommunications, electronics circuitry, and countless types of electrical equipment. Copper and its alloys are also used to make electrical contacts.
Electrical wiring in buildings is the most important market for the copper industry. Roughly half of all copper mined is used to manufacture electrical wire and cable conductors.
Copper Cable
Coaxial cable
Coaxial cable, or coax (pronounced 'ko.aks), is a type of cable that has an inner conductor surrounded by a tubular insulating layer, surrounded by a tubular conducting shield. Many coaxial cables also have an insulating outer sheath or jacket. The term coaxial comes from the inner conductor and the outer shield sharing a geometric axis. Coaxial cable was invented by English engineer and mathematician Oliver Heaviside, who patented the design in 1880.Coaxial cable differs from other shielded cable used for carrying lower-frequency signals, such as audio signals, in that the dimensions of the cable are controlled to give a precise, constant conductor spacing, which is needed for it to function efficiently as a radio frequency transmission line.
Coaxial cable is expensive and does not support many LAN's. It supports data and video.
Coaxial Cable
Fiber optics
An optical fiber cable is a cable containing one or more optical fibers that are used to carry light. The optical fiber elements are typically individually coated with plastic layers and contained in a protective tube suitable for the environment where the cable will be deployed. Different types of cable are used for different applications, for example long distance telecommunication, or providing a high-speed data connection between different parts of a building.
Fiber optics used for long distance, hard to splice, not vulnerable to cross talk and difficult to tap. It supports voice data, image and video.
Fiber Optics
Microwave radio system
Microwave transmission refers to the technology of transmitting information or energy by the use of radio waves whose wavelengths are conveniently measured in small numbers of centimeter; these are called microwaves.
Microwaves are widely used for point-to-point communications because their small wavelength allows conveniently-sized antennas to direct them in narrow beams, which can be pointed directly at the receiving antenna. This allows nearby microwave equipment to use the same frequencies without interfering with each other, as lower frequency radio waves do. Another advantage is that the high frequency of microwaves gives the microwave band a very large information-carrying capacity; the microwave band has a bandwidth 30 times that of all the rest of the radio spectrum below it. A disadvantage is that microwaves are limited to line of sight propagation; they cannot pass around hills or mountains as lower frequency radio waves can.
Microwave radio transmission is commonly used in point-to-point communication systems on the surface of the Earth, in satellite communications, and in deep space radio communications. Other parts of the microwave radio band are used for radars, radio navigation systems, sensor systems, and radio astronomy.
Microwave radio systems are carriers for voice data signal, cheap and easy to intercept.
Microwave Radio System
Satellite Radio Link
Satellite radio is a radio service broadcast from satellites primarily to cars, with the signal broadcast nationwide, across a much wider geographical area than terrestrial radio stations. It is available by subscription, mostly commercial free, and offers subscribers more stations and a wider variety of programming options than terrestrial radio.
Satellite radio link uses transponder to send information and easy to intercept.
Radio System
Radio systems are used for short distance, cheap and easy to tap.
Radio is the radiation (wireless transmission) of electromagnetic signals through the atmosphere or free space.
Information, such as sound, is carried by systematically changing (modulating) some property of the radiated waves, such as their amplitude, frequency, phase, or pulse width. When radio waves strike an electrical conductor, the oscillating fields induce an alternating current in the conductor. The information in the waves can be extracted and transformed back into its original form.
The following answers are incorrect:
Copper Cable- Copper cable is very simple to install and easy to tap. It is used mostly for short distance and supports voice and data.
Satellite Radio Link - Satellite radio link uses transponder to send information and easy to tap.
Coaxial cable - Coaxial cable are expensive and does not support many LAN's. It supports data and video The following reference(s) were/was used to create this question:
CISA review manual 2014 page number 265
NEW QUESTION # 843
To ensure confidentiality through the use of asymmetric encryption, a message is encrypted with which of the following?
Answer: A
Explanation:
The best option for ensuring confidentiality through the use of asymmetric encryption is to encrypt a message with the recipient's public key (option A). This is because:
* Asymmetric encryption, also known as public-key cryptography, is a type of encryption that uses a pair of keys to encrypt and decrypt data. The pair of keys includes a public key, which can be shared with anyone, and a private key, which is kept secret by the owner12.
* In asymmetric encryption, the sender uses the recipient's public key to encrypt the data. The recipient then uses their private key to decrypt the data. This approach allows for secure communication between two parties without the need for both parties to have the same secret key12.
* Encrypting a message with the recipient's public key ensures that only the recipient can decrypt it with their private key. This provides confidentiality, which means that the message is protected from unauthorized access or disclosure12.
* Encrypting a message with the sender's private key (option B) does not ensure confidentiality, but rather authentication, which means that the message can be verified as coming from the sender. This is because anyone can decrypt the message with the sender's public key, but only the sender can encrypt it with their private key12.
* Encrypting a message with the sender's public key (option C) or the recipient's private key (option D) does not make sense, as it would render the message unreadable by both parties. This is because neither party has the corresponding key to decrypt it12.
Therefore, the best option for ensuring confidentiality through the use of asymmetric encryption is to encrypt a message with the recipient's public key (option A), as this ensures that only the recipient can decrypt it with their private key.
References: 1: What is asymmetric encryption? | Asymmetric vs. symmetric ... - Cloudflare 2: What is Asymmetric Encryption? - GeeksforGeeks
NEW QUESTION # 844
Which of the following is the GREATEST risk if two users have concurrent access to the same database record?
Answer: B
Explanation:
Explanation
The greatest risk if two users have concurrent access to the same database record is data integrity. Data integrity is the property that ensures that the data is accurate, complete, consistent, and valid throughout its lifecycle. If two users have concurrent access to the same database record, they may modify or delete the data in a conflicting or inconsistent manner, resulting in data corruption, loss, or duplication. This can affect the reliability and quality of the data, and cause errors or anomalies in the database operations and functions. The IS auditor should verify that the database has adequate controls to prevent or resolve concurrent access issues, such as locking mechanisms, transaction isolation levels, concurrency control protocols, or timestamping methods. References: CISA Review Manual (Digital Version)1, Chapter 5, Section 5.2.7
NEW QUESTION # 845
An IS auditor is preparing a plan for audits to be carried out over a specified period. Which of the following activities should the IS auditor perform FIRST?
Answer: C
Explanation:
An audit universe is a comprehensive list of all the auditable entities, processes, and activities within an organization. It helps the IS auditor to identify the scope, objectives, and priorities of the audit plan, as well as the resources and methodologies required to conduct the audits. An audit universe can also help the IS auditor to ensure that all the key risks, controls, and regulations are covered by the audit plan, and that there are no gaps or overlaps in the audit coverage.
The first activity that the IS auditor should perform when preparing a plan for audits to be carried out over a specified period is to determine the audit universe. This involves defining the criteria and methods for identifying and categorizing the auditable units, such as by business function, process, system, location, or risk level. The IS auditor should also consult with the management and other stakeholders to obtain their input and expectations for the audit plan. The IS auditor should then document and validate the audit universe, and update it regularly to reflect any changes in the organization's structure, operations, or environment.
The other three activities are also important for preparing an audit plan, but they should be performed after determining the audit universe. Allocating audit resources involves assigning staff, time, budget, and tools to each audit based on their complexity, priority, and availability. Prioritizing risks involves assessing the likelihood and impact of each risk associated with each auditable unit, and ranking them according to their significance and urgency. Reviewing prior audit reports involves analyzing the findings, recommendations, and actions from previous audits related to each auditable unit, and evaluating their current status and relevance.
Therefore, determining the audit universe is the best answer.
References:
* Audit Universe - UPDATED 2022 - Examples, Templates & More!
* 01 February 2023 Audit universe - IIA
NEW QUESTION # 846
Which of the following is the MAIN risk associated with adding a new system functionality during the development phase without following a project change management process?
Answer: B
NEW QUESTION # 847
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